Factors Controlling Retention in FFF

Specifically, the concentration distribution in the channel, as we noted earlier, is exponential in coordinate y its form is given by Eq. 6.19, that is 

The flow velocity profile needed here is that for thin rectangular channels as developed in Section 4.4. Equation 4.17 gives 

The evaluation of these integrals is straightforward, requiring integration by parts. We find 

We see that A is a dimensionless form of , representing the ratio of to channel thickness w. 

The substitution of the A, , and C expressions back into Eq. 9.24, followed by rearrangement, yields 

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